Crusher



' April l4, 1925.

A. J. JORGENSEN CRUSHER Filed Feb.

Patented Apr. 14, 1925.

v UNITED" STATES PATENT OFFICE.

ARTHUR J. JoRGENsEN, or MILWAUKEE wIscoNsIN, ASSIGNOR- TO ALLIS-CHALMERS MANUFACTURING COMPANY, or MILWAUKEE, WIsooN-SIN, a oonronA'rIo or DELAWARE.

GRU'SHER.

Application filed February 19, 1921. Serial No. 446,209.

To all whom it may concern:

Be it known that ARTHUR J. J ORGENSEN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of lVisconsin, has invented a certainv new and useful Improvement in Crushers, of which the following is a specification;

This invention relates in general to crushers. It may be applied with particular advantage in crushers of the gyratory type.

One of the objects of the invention is the provision of a crusher which may be economically built and which is of minlmum size and weight compared to its capacity. A. more specific object is the provision of a crusher shell in which means are provided for preventing contact between portions of the means for producing gyratory motion and the diaphragm of the shell. 7

Other objects will appear hereinafter as the description of the invention proceeds.

The novel features of the invention w1ll appear from this specification and the accompanying drawing forming a part thereof and disclosing one embodiment of said invention, and all these novel features are intended to be pointed out in the claims.

I Fig. 1 is a fragmentary front elevation of a crush'er embodying the features of the invention, a portion thereof being shown 1n vertical section. i

Fig. 2 is a horizontal section of the crusher shownin Fig; 1 taken along the line Il -II.

Fig. 3 is a fragmentarysection of a modified detail.

The crusher is provided with a bottom shell 1, adapted in'this instance, to support a top shell 2. A crusher shaft 3, carrymg a crusher head 4 is provided, and disposed within the crusher shell.

' i The bottom shell 1 is provided with a bifurcated discharge opening comprising the discharge openings 5, 6, only the opening 5-being visible in Fig. 1. The shell 1 is provided with an inclined diaphragm proper 7 including discharge chutes 8, 9 cooperating with the openings 5, 6 respectively. The discharge chute 8 is provided with an outer substantially vertical wall 10 forming part of and merging into the cylindrical portion of thebottom shell 1. The chute 9 is similarly provided with an outer wall 11. These wallsare substantially plane and are. tangent tothe inner cylindrical contour; of the bottom shell approximately at the ends of the chord of a length almost equal to a cliameter and parallel to the general plane of the discharge openings. The diaphragm in cludes a semiannular portion 12 in the rear half of the bottom shell. This semi-annular portion forms an extension of the respective chutes '8, 9. The inner portion of the diaphragm is bounded by a pipe-like port-ion 13 of general cylindrical form, preferably cast integral with the diaphragm and shell. The crusher shaft is adapted to pass through this pipe-like portion, as will be clear from Figs. 1 and 2. The pipe-like portion 13 is preferably formed with bulges 14:," 15 on each side thereof forming generally conoidal portions tangential to the substantially cylindrical. portion of the pipe. The optimum form of the bulges 14, 15 is such as not to interfere with the free descent of crushed material from any point on the diaphragm toward the discharge openings. The chute 8 is provided with an inside vertical wall 16 extending from that portion of the shell between the discharge openings to and tangent to the conoidal portion 15. The chute 9 is similarly provided with an inside wall 17 extending from that portion of the shell between the discharge openings to and tangent to the conoidal portion 14. The walls 16, 17 are surmounted by a saddle-like portion comprising oppositely inclined surfaces 18, 19. This saddle thus also acts as a portion of the diaphragm.

A saddle-like member 20 is provided at the rear of the pipe-like portion 13 for the purpose of preventing lodgement of crushed material at the rear of the pipe.

The shell 1 is provided with'an opening 21 with which a bearing member 22 is adapted to cooperate, thus providing for the passage of the crusher driving shaft 23 into the shell. The crusher driving shaft is provided with a bevel pinion 2a meshing with a bevel gear 25. The bevel gear 25 is operatively related to an eccentric 26 surrounding the lower end of the crusher shaft 3. An outer bearing member 27 is provided for the eccentric. The eccentric has a dust bonnet28 operatively related thereto, said dust bonnet having a transversely extending portion 30 extending over the bearing member 27. The shaft 3 carries a dust ring 29 extending over a portion of the dust bonnet 28. The purpose of the dust bonnet and dust ring is to prevent the entrance of foreign material into the lubricating medium.

The general type of crusher herein disclosed including a bifurcated discharge opening with discharge chutes cooperating therewith enables a very considerable reduction to be made in the height of the bottom shell inasmuch as the eccentric and bearing member therefor may be brought closer to the crusher head.v This feature and other features of the crusher disclosed in this application are more fully set forth and claimed in the application of Ray C. Newhouse, S. N. 434,493, filed Jan. 3, 1921. The present invention enables a still further reduction to be made in the height of the bottom shell. Referring to Fig. 1 it will be observed that the conoidal portion 14 is so formed and disposed that the dust bonnet 30 moving with the means for producing gyratory motion of the shaft, that is, the eccentric 26, and the dust ring 29, may be considerably above the central level of the diaphragm 7, ample clearance being provided between the diaphragm and parts thereof as the cylinder-like portion 13.

Fig. 8 shows a slightly modified form of the pipe-like portion of the diaphragm. The bulge 141 is generated by straight lines extending from the intersection of the pipelike portion 13 and the diaphragm proper 12, clear to the top of said portion 13. The line of intersection between the portion 13 and diaphragm 12 may be the same in the modified form of Fig. 3 as in Figs. 1 and 2, that is, it may have the same shape as shown in Fig. 2.

If desired, the shell 1 may be provided with bulges corresponding to bulges 14, 15 and opposite said bulges respectively.

It should be understood that it is not desired that the invention claimed be limited to the exact details of construction shown and described herein, for obvious modifications may occur to persons skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. A crusher comprising a substantially cylindrical shell, means permitting reduction in the height of said shell including a pair of adjacent discharge openings and a diaphragm comprising a pipe-like portion through which the crusher shaft is adapted to pass and a pair of discharge chutes cooperating with said discharge openings, and means for further permitting reduction in the height of said shell including the provision of a conoidal base for said pipe-like portion.

2. A crusher comprising a substantially cylindrical shell provided with a discharge opening, a diaphragm for said shell including a pipe-like portion rising above the diaphragm proper through which the crusher shaft is adapted to pass, said pipe like portion being provided with a conoidal base having a major axis substantially parallel to the general plane of said discharge opening.

3. A crusher comprising a substantially cylindrical shell provided with two adj acent openings, a diaphragm for said shell including a pair of discharge chutes cooperating with said openings respectively, said diaphragm also including a pipe-like portion through which the crusher shaft is adapted to pass, said pipe-like portion being provided with a conoidal base having a major axis substantially parallel to the general plane of said discharge openings. 4. A crusher comprising a substantially cylindrical shell provided with two adjacent discharge openings, a diaphragm for said shell including a pair of discharge chutes cooperating with said adjacent openings respectively, said diaphragm also including a pipe-like portion throughwhich the crusher shaft is adapted to pass, said pipe-like portion being provided with a conoidal base having its major axis substantially parallel to the general plane of said adjacent openings, and an inner'wall for one of said discharge chutesextending from said shell between said adjacent openings to and tangent with said conoidal base.

5. In a crusher of the type including a shell provided with a diaphragm cooperating with a discharge opening in said shell, said diaphragm including a pipe-like portion, a crusher shaft extending through said pipe-like portion, means within said shell for imparting a gyratory motion to said shaft, said means having portions above the central level of said diaphragm, and means for'permitting reduction in the height of said shell including lateral bulges on said pipe-like portion, whereby said pipe-like portion has a non-circular cross section at the diaphragm.

6. A crusher comprising a substantially cylindrical shell provided with a discharge opening, a diaphragm for said shell including a pipe-like portion through which the crusher shaft is adapted to pass, said pipe-like portion being provided with lateral bulges,'whereby said pipe-like portion has a non-circular cross section at the diaphragm, said bulges extending in a direction suhstantially parallel to the general plane of said discharge opening.

7. In a crusher of the type including a shell provided with a diaphragm cooperating with a discharge opening in said shell, said diaphragm including a pipe-like portion, a crusher shaft extending through said pipe-like portion, an eccentric within said shell for imparting a gyratory motion to said shaft, means associated with said eccentric and above the central level of said diaphragm for preventing the entry of dust into the eccentric bearing surfaces, and means comprising lateral bulges on said pipe-like portion for preventing contact between said last named means and said diaphragm.

8. A crusher comprising a substantially cylindrical shell provided with two adjacent openings, a diaphragm for said shell including a pair of discharge chutes cooperating with said openings respectively, said diaphragm also including a pipe-like portion through which the crusher shaft is adapted to pass, said pipe-like portion being provided with lateral bulges extending in a direction substantially parallel to the general plane of said discharge openings.

9. A crusher comprising a shell provided with a discharge opening, a diaphragm for said shell including a pipe-like portion through which the. crusher shaft is adapted to pass, said pipe-like portion being provided with lateral bulges, whereby said pipelike portion has a non-circular cross section at the diaphragm, said bulges extending in a direction substantially parallel to the general plane of said discharge opening.

In testimony whereof, the signature of the inventor is afiixed hereto.

ARTHUR J. J ORGENSEN 

